Norman mc farlane henderson



(No Model.)

N. MeF. HENDERSON.

, APPARATUS FOR COOLING OIL T0 EXTRACT PARAFPINE, &o. No. 348,904,. Patented Sept. 7, 1886.

N. PEIERS. Mo-LM'uognpMn Wnbingtwn. D41.

UNITED STATES PATENT OFFICE.

NORMAN llloFAltLANE HENDERSON, OF BROXBURN, COUNTY OF LINLITH- GOV, SCOTLAND.

APPARATUS FOR COOLING OIL TO EXTRACT PARAFFINE, 80C.

SPECIFICATION forming part of Letters Patent No. 348,904, dated September 7, 1886.

Application filed April 20, 1886. Serial No.199j0l To all whom, it may concern.-

Be it known that l, NORMAN llICFARLANE HENDERSON, a subject of the Queen of Great Britain and Ireland, and a resident of Broxburn, in the county of Linlithgow, Scotland, have invented an improved apparatus for cooling oil in order to congeal parail'ine dissolved therein and applicable for cooling other liquids for analogous purposes, (for which I have obtained a British Patent, dated June 30, 1884, No. 9,557,) of which the following is a specification.

My said invention has principally for its ob ject to improve, expedite, and cheapen that part of the manufacturing or refining processes applied to shale oil,whieh consists in separating parafiine of a kind solid at ordinary temperatures from oil containing it in solution. At the same time the improved apparatus which I have devised may be advantageouslyused for cooling various liquids for the purpose of separating congealable matters from them.

My improved apparatus comprises a trough or vat formed with a jacket-space, through which refrigerated brine or other suitable cooling-i'luid circulates, and in order to obtain extensive and efficient cooling-snrl'aces in a eompact form there are placed within the trough a number of transverse verti cal disk-casi ngs with thin spaces for the circulation of the coolingfluid. A, horizontal rotating shalt passes through the centers of the dislecasings and carries scrapers,which detach the parat'line as it congeals 011 the cooled surfaces, while alower shaft with agitatingblades or paddles breaks up and mixes the congealed parafline so as to facilitate its discharge along with the oil.

On the accompanying sheet of explanatory drawings, Figures 1 and 2 are transverse and longitudinal vertical sections, and the other figures are enlarged views of details.

The outer shell of the trough is represented as constructed with vertical Wrought-iron end plates, 11, and with flanged cast-iron side plates, 12 13, and bottom plates, 1-1 15. An inner shell, 16, of sheet-iron, is fixed by means of angle-iron to the'end plates, 11. \Vithin the inner shell there are placed a number of thin transverse vertical casings, each consisting of two disks, 17, of thin metal riveted upon a (No lllOllULl Pntvnted in Eng and June 30, 18 4, No. 9,557.

frame, 18, made of bar-iron in the shape of the letter D, butwith the straight side horizontal, and with the lowerpart semicircular. At the centers of the semicircular parts holes are formed through the disks 17 for the passage of a shaft, 20, and a ring is riveted between each pair of disks 17 at the holes to prevent communication there with the space between the disks. A bar, 21., (indicated by dotted lines in Fig. 1,) extends from the ringup to the top bar of the frame 18 to divide theupper part of the space between the disks, and thereby cause a proper circulation of the cooling-fluid which enters the space by a pipe, 22, at one upper corner and leaves it by a pipe, 23, at the other upper corner. The latter pipe,23,discharges into the jacketspace between the inner shell, 16, and the outer shell of the trough, the coolingfiuid passing through thisjacket space after passing through the disk-spaces. The disk-casings 17 18 are held in position by means of projections 2t at the top corners of the frames, such projections being bolted to angleirons fixed to the sides of the trough. The frames 18 are also provided with bottom projections, 25, which enter sockets formed for them-in a cast-iron frame, 26, which is bolted to the end plates, 1.1, of the trough and extend from one to the other. The shaft 20 passes through a stuffing-box, 27, at one end of the trough, its other end being held in a bearingpiece, 29, and is driven by external gearing at a slow speed. In each interval between the disk-casings 17 18 the shaft 20 has fixed on it oneor more arms carrying scrapers for detaching the parafline which congeals upon and adheres to the disk 17. One of these scraper-arms 30 is shown detached in Fig. 3. Its inner endis made with a halt round socket to fit the shaft, and a cap, 31, with a half-round socket, is applied to the other side of the shaft and is bolted to the arm, thereby fixing it on the shaft.

In the case of every {M11130 which is between two disk-casings, 17 18, there are jointed to it two scrapers, 32, as best seen in Fig. 4, which shows an arm, 30, in end view. Each scraper 32 is formed with a number of bored lugs, 33, which are jointed to similar lugs, 34, on the arm 30 by means of a rod, and the two scrapers, 32 on one arm 30 are pressed apart by means of one or more helical springs, 35, placed between them on pins formed on them for the purpose,so as to press the outer scraping-edges against the disks 17.

The arms 30,between the end plates, 11, and the nearest disks 17, may be fitted each with two scrapers, one to act on the disk 17 and the other to act on the end plate, 11; or there may in each case be a single scraper to act on the disk 17.

Below the disk-casings 17 18 the innershell, 16, of the trough is shaped to form a com para tively narrow channel, 36, into which the congealed paraffiue descends. In this channel there is a lowerlougitudinal shaft, 37, passing out through astuffing-box, 38, at one end and having on it a number of blades or paddles, 39, which with the rotation of the shaft stir and mix up the paraffine,so as to form with the oil a semi-fluid mass which will flow through the discharge-pipe 40.

The shaft 37 may have on it fast and loose pulleys for a driving-belt, and a pinion, 41, gearing with a spur-wheel, 42, on the upper shaft, 20, for driving the latter.

The oil or liquid to be treated is simply poured into the open top of the trough either intermittently or continuously, and the mixture of oil and congealed paraffine is drawn off by the pipe 40 in a similar way, but so as to give time for the efficient operation ofthe cooling action.

Vhat I claim as my invention is- 1. In apparatus for cooling liquids and congealing ingredients therein, the combination consisting of a vat, a jacket-space inclosing the vat, a number of transverse disk-casings in the vat, a horizontal shaft passing through the disk-casings and fitted with scrapers, a lower shaft fitted with agitatingblades, and means fol-circulating cooling-fluid through the disk-casings and jacket-space, substantially as and for the purposes herein set forth.

2. The combination and arrangement con sisting of a series of transverse disk-casings with means for circulating cooling-fluid within them, and with a shaft passing through them, and moving scrapers over their outer surfaces, substantially as herein set forth.

3. The construction of the disk-casings,each consisting of two disks riveted upon a frame and having a bar extending from rings for the shaft to pass through, and riveted at the center up to the top bar of the frame, for regulating the circulation of the cooling-fluid within them, substantially as herein set forth.

4. The construction of the spring-scrapers, each consisting of an arm having jointed to it two scraper-blades pressed apart by springs so as to operate on the surfaces of the two diskcasings between which each scraper is placed, substantially as herein set forth.

In testimony whereofI have signed my name to this specification in the presence of two subscribing witnesses.

N. M. HENDERSON.

Vitnesses:

EDMUND HUNT, DAVID FERGUSON. 

